FCC/Applications/VaporRecoveryOnlineWatchProject/VaporRecoveryOnlineWatchHubApp/Util/Util.cs

using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;

namespace VaporRecoveryOnlineWatchHubApp
{
    public static class Util
    {
        // 中式四舍五入
        public static decimal Round<T>(T input, int digits = 2)
        {
            return Math.Round(Convert.ToDecimal(input), digits, MidpointRounding.AwayFromZero);
        }

        // 中式四舍五入
        public static double RoundToDouble<T>(T input, int digits = 2)
        {
            return (double)Math.Round(Convert.ToDecimal(input), digits, MidpointRounding.AwayFromZero);
        }
    }

    public static class StringExtension
    {
        //"""全角转半角"""
        /// 转全角的函数(SBC case)
        ///
        ///任意字符串
        ///全角字符串
        ///
        ///全角空格为12288，半角空格为32
        ///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
        ///
        public static string ToSBC(this string input)
        {
            // 半角转全角：
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        /**/
        // /
        // / 转半角的函数(DBC case)
        // /
        // /任意字符串
        // /半角字符串
        // /
        // /全角空格为12288，半角空格为32
        // /其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
        // /
        public static string ToDBC(this string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        // 移除空格
        public static string RemoveSpaces(this string input)
        {
            return input.Replace(" ", "");
        }

        // 移除String List里的元素
        public static string RemoveStringList(this string input, List<string> strList)
        {
            var output = input;
            strList.ForEach(s => {
                output = output.Replace(s, "");
            });
            return output;
        }

        // 移除前缀字符串
        public static string RemovePrefixString(this string self, string str)
        {
            string strRegex = @"^(" + str + ")";
            return Regex.Replace(self, strRegex, "");
        }

        // 移除后缀字符串
        public static string RemoveSuffixString(this string self, string str)
        {
            string strRegex = @"(" + str + ")" + "$";
            return Regex.Replace(self, strRegex, "");
        }

        // 是否为Email
        public static bool IsEmail(this string self)
        {
            return self.RegexMatch(@"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$");
        }

        // 是否为域名
        public static bool IsDomain(this string self)
        {
            return self.RegexMatch(@"[a-zA-Z0-9][-a-zA-Z0-9]{0,62}(/.[a-zA-Z0-9][-a-zA-Z0-9]{0,62})+/.?");
        }

        // 是否为IP地址
        public static bool IsIP(this string self)
        {
            return self.RegexMatch(@"((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))");
        }

        // 是否为手机号码
        public static bool IsMobilePhone(this string self)
        {
            return self.RegexMatch(@"^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\d{8}$");
        }

        // 匹配正则表达式
        public static bool RegexMatch(this string slef, string pattern)
        {
            Regex reg = new Regex(pattern);
            return reg.Match(slef).Success;
        }

        // 转换为MD5, 加密结果"x2"结果为32位,"x3"结果为48位,"x4"结果为64位
        public static string ConvertToMD5(this string self, string flag = "x2")
        {
            byte[] sor = Encoding.UTF8.GetBytes(self);
            MD5 md5 = MD5.Create();
            byte[] result = md5.ComputeHash(sor);
            StringBuilder strbul = new StringBuilder(40);
            for (int i = 0; i < result.Length; i++)
            {
                strbul.Append(result[i].ToString(flag));
            }
            return strbul.ToString();
        }

        // 转换为32位MD5
        public static string ConvertToMD5_32(this string self)
        {
            return ConvertToMD5(self, "x2");
        }

        // 转换为48位MD5
        public static string ConvertToMD5_48(this string self)
        {
            return ConvertToMD5(self, "x3");
        }

        // 转换为64位MD5
        public static string ConvertToMD5_64(this string self)
        {
            return ConvertToMD5(self, "x4");
        }
    }
}